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Boyang Chen commented on KAFKA-10284: ------------------------------------- [~akshaysh] I didn't see any trace that the group coordinator gets migrated in the pasted ticket, so it might be a separate issue. [~ableegoldman] Well, the symptom matches, but I don't know for sure if this is the same cause :) > Group membership update due to static member rejoin should be persisted > ----------------------------------------------------------------------- > > Key: KAFKA-10284 > URL: https://issues.apache.org/jira/browse/KAFKA-10284 > Project: Kafka > Issue Type: Bug > Components: consumer > Affects Versions: 2.3.0, 2.4.0, 2.5.0, 2.6.0 > Reporter: Boyang Chen > Assignee: Boyang Chen > Priority: Major > Fix For: 2.6.1 > > > For known static members rejoin, we would update its corresponding member.id > without triggering a new rebalance. This serves the purpose for avoiding > unnecessary rebalance for static membership, as well as fencing purpose if > some still uses the old member.id. > The bug is that we don't actually persist the membership update, so if no > upcoming rebalance gets triggered, this new member.id information will get > lost during group coordinator immigration, thus bringing up the zombie member > identity. > The bug find credit goes to [~hachikuji] -- This message was sent by Atlassian Jira (v8.3.4#803005)